These grading apps cost absolutely nothing and can have loads of tools for teachers.
Engrade Nearly three million members have signed up for this online teacher toolset. It includes a gradebook, homework calendar, quizzes, attendance forms, and many others. Simply sign up to begin or check out the demo.
Thinkwave Their educator software is free to use. It has flexible grading options, reporting, and even the option to post grades online. There is also a paid option for administrators with more.
SnapGrades They offer four different options in online grading. The free version includes a gradebook, attendance, seating charts, and discipline logs. There are also options for single teachers, groups, and even specialty options for individual students.